+++ /dev/null
-From 36bb4f0ab8e7ef69cc11d4d888aa898223b0e901 Mon Sep 17 00:00:00 2001
-From: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
-Date: Mon, 1 Mar 2021 19:09:04 +0200
-Subject: [PATCH 153/247] ASoC: mchp-i2s-mcc: Add FIFOs support
-
-I2S-MCC found on SAMA7G5 includes 2 FIFOs (capture and playback). When
-FIFOs are enabled, bits I2SMCC_ISRA.TXLRDYx and I2SMCC_ISRA.TXRRDYx must
-not be used. Bits I2SMCC_ISRB.TXFFRDY and I2SMCC_ISRB.RXFFRDY must be used
-instead.
-
-Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
-Link: https://lore.kernel.org/r/20210301170905.835091-7-codrin.ciubotariu@microchip.com
-Signed-off-by: Mark Brown <broonie@kernel.org>
----
- sound/soc/atmel/mchp-i2s-mcc.c | 76 +++++++++++++++++++++++++---------
- 1 file changed, 56 insertions(+), 20 deletions(-)
-
---- a/sound/soc/atmel/mchp-i2s-mcc.c
-+++ b/sound/soc/atmel/mchp-i2s-mcc.c
-@@ -176,7 +176,7 @@
- */
- #define MCHP_I2SMCC_MRB_CRAMODE_REGULAR (1 << 0)
-
--#define MCHP_I2SMCC_MRB_FIFOEN BIT(1)
-+#define MCHP_I2SMCC_MRB_FIFOEN BIT(4)
-
- #define MCHP_I2SMCC_MRB_DMACHUNK_MASK GENMASK(9, 8)
- #define MCHP_I2SMCC_MRB_DMACHUNK(no_words) \
-@@ -230,6 +230,7 @@ static const struct regmap_config mchp_i
-
- struct mchp_i2s_mcc_soc_data {
- unsigned int data_pin_pair_num;
-+ bool has_fifo;
- };
-
- struct mchp_i2s_mcc_dev {
-@@ -257,7 +258,7 @@ struct mchp_i2s_mcc_dev {
- static irqreturn_t mchp_i2s_mcc_interrupt(int irq, void *dev_id)
- {
- struct mchp_i2s_mcc_dev *dev = dev_id;
-- u32 sra, imra, srb, imrb, pendinga, pendingb, idra = 0;
-+ u32 sra, imra, srb, imrb, pendinga, pendingb, idra = 0, idrb = 0;
- irqreturn_t ret = IRQ_NONE;
-
- regmap_read(dev->regmap, MCHP_I2SMCC_IMRA, &imra);
-@@ -275,24 +276,36 @@ static irqreturn_t mchp_i2s_mcc_interrup
- * Tx/Rx ready interrupts are enabled when stopping only, to assure
- * availability and to disable clocks if necessary
- */
-- idra |= pendinga & (MCHP_I2SMCC_INT_TXRDY_MASK(dev->channels) |
-- MCHP_I2SMCC_INT_RXRDY_MASK(dev->channels));
-- if (idra)
-+ if (dev->soc->has_fifo) {
-+ idrb |= pendingb & (MCHP_I2SMCC_INT_TXFFRDY |
-+ MCHP_I2SMCC_INT_RXFFRDY);
-+ } else {
-+ idra |= pendinga & (MCHP_I2SMCC_INT_TXRDY_MASK(dev->channels) |
-+ MCHP_I2SMCC_INT_RXRDY_MASK(dev->channels));
-+ }
-+ if (idra || idrb)
- ret = IRQ_HANDLED;
-
-- if ((imra & MCHP_I2SMCC_INT_TXRDY_MASK(dev->channels)) &&
-- (imra & MCHP_I2SMCC_INT_TXRDY_MASK(dev->channels)) ==
-- (idra & MCHP_I2SMCC_INT_TXRDY_MASK(dev->channels))) {
-+ if ((!dev->soc->has_fifo &&
-+ (imra & MCHP_I2SMCC_INT_TXRDY_MASK(dev->channels)) &&
-+ (imra & MCHP_I2SMCC_INT_TXRDY_MASK(dev->channels)) ==
-+ (idra & MCHP_I2SMCC_INT_TXRDY_MASK(dev->channels))) ||
-+ (dev->soc->has_fifo && imrb & MCHP_I2SMCC_INT_TXFFRDY)) {
- dev->tx_rdy = 1;
- wake_up_interruptible(&dev->wq_txrdy);
- }
-- if ((imra & MCHP_I2SMCC_INT_RXRDY_MASK(dev->channels)) &&
-- (imra & MCHP_I2SMCC_INT_RXRDY_MASK(dev->channels)) ==
-- (idra & MCHP_I2SMCC_INT_RXRDY_MASK(dev->channels))) {
-+ if ((!dev->soc->has_fifo &&
-+ (imra & MCHP_I2SMCC_INT_RXRDY_MASK(dev->channels)) &&
-+ (imra & MCHP_I2SMCC_INT_RXRDY_MASK(dev->channels)) ==
-+ (idra & MCHP_I2SMCC_INT_RXRDY_MASK(dev->channels))) ||
-+ (dev->soc->has_fifo && imrb & MCHP_I2SMCC_INT_RXFFRDY)) {
- dev->rx_rdy = 1;
- wake_up_interruptible(&dev->wq_rxrdy);
- }
-- regmap_write(dev->regmap, MCHP_I2SMCC_IDRA, idra);
-+ if (dev->soc->has_fifo)
-+ regmap_write(dev->regmap, MCHP_I2SMCC_IDRB, idrb);
-+ else
-+ regmap_write(dev->regmap, MCHP_I2SMCC_IDRA, idra);
-
- return ret;
- }
-@@ -664,6 +677,10 @@ static int mchp_i2s_mcc_hw_params(struct
- }
- }
-
-+ /* enable FIFO if available */
-+ if (dev->soc->has_fifo)
-+ mrb |= MCHP_I2SMCC_MRB_FIFOEN;
-+
- /*
- * If we are already running, the wanted setup must be
- * the same with the one that's currently ongoing
-@@ -726,8 +743,13 @@ static int mchp_i2s_mcc_hw_free(struct s
- if (err == 0) {
- dev_warn_once(dev->dev,
- "Timeout waiting for Tx ready\n");
-- regmap_write(dev->regmap, MCHP_I2SMCC_IDRA,
-- MCHP_I2SMCC_INT_TXRDY_MASK(dev->channels));
-+ if (dev->soc->has_fifo)
-+ regmap_write(dev->regmap, MCHP_I2SMCC_IDRB,
-+ MCHP_I2SMCC_INT_TXFFRDY);
-+ else
-+ regmap_write(dev->regmap, MCHP_I2SMCC_IDRA,
-+ MCHP_I2SMCC_INT_TXRDY_MASK(dev->channels));
-+
- dev->tx_rdy = 1;
- }
- } else {
-@@ -737,8 +759,12 @@ static int mchp_i2s_mcc_hw_free(struct s
- if (err == 0) {
- dev_warn_once(dev->dev,
- "Timeout waiting for Rx ready\n");
-- regmap_write(dev->regmap, MCHP_I2SMCC_IDRA,
-- MCHP_I2SMCC_INT_RXRDY_MASK(dev->channels));
-+ if (dev->soc->has_fifo)
-+ regmap_write(dev->regmap, MCHP_I2SMCC_IDRB,
-+ MCHP_I2SMCC_INT_RXFFRDY);
-+ else
-+ regmap_write(dev->regmap, MCHP_I2SMCC_IDRA,
-+ MCHP_I2SMCC_INT_RXRDY_MASK(dev->channels));
- dev->rx_rdy = 1;
- }
- }
-@@ -765,7 +791,7 @@ static int mchp_i2s_mcc_trigger(struct s
- struct mchp_i2s_mcc_dev *dev = snd_soc_dai_get_drvdata(dai);
- bool is_playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
- u32 cr = 0;
-- u32 iera = 0;
-+ u32 iera = 0, ierb = 0;
- u32 sr;
- int err;
-
-@@ -789,7 +815,10 @@ static int mchp_i2s_mcc_trigger(struct s
- * Enable Tx Ready interrupts on all channels
- * to assure all data is sent
- */
-- iera = MCHP_I2SMCC_INT_TXRDY_MASK(dev->channels);
-+ if (dev->soc->has_fifo)
-+ ierb = MCHP_I2SMCC_INT_TXFFRDY;
-+ else
-+ iera = MCHP_I2SMCC_INT_TXRDY_MASK(dev->channels);
- } else if (!is_playback && (sr & MCHP_I2SMCC_SR_RXEN)) {
- cr = MCHP_I2SMCC_CR_RXDIS;
- dev->rx_rdy = 0;
-@@ -797,7 +826,10 @@ static int mchp_i2s_mcc_trigger(struct s
- * Enable Rx Ready interrupts on all channels
- * to assure all data is received
- */
-- iera = MCHP_I2SMCC_INT_RXRDY_MASK(dev->channels);
-+ if (dev->soc->has_fifo)
-+ ierb = MCHP_I2SMCC_INT_RXFFRDY;
-+ else
-+ iera = MCHP_I2SMCC_INT_RXRDY_MASK(dev->channels);
- }
- break;
- default:
-@@ -815,7 +847,10 @@ static int mchp_i2s_mcc_trigger(struct s
- }
- }
-
-- regmap_write(dev->regmap, MCHP_I2SMCC_IERA, iera);
-+ if (dev->soc->has_fifo)
-+ regmap_write(dev->regmap, MCHP_I2SMCC_IERB, ierb);
-+ else
-+ regmap_write(dev->regmap, MCHP_I2SMCC_IERA, iera);
- regmap_write(dev->regmap, MCHP_I2SMCC_CR, cr);
-
- return 0;
-@@ -903,6 +938,7 @@ static struct mchp_i2s_mcc_soc_data mchp
-
- static struct mchp_i2s_mcc_soc_data mchp_i2s_mcc_sama7g5 = {
- .data_pin_pair_num = 4,
-+ .has_fifo = true,
- };
-
- static const struct of_device_id mchp_i2s_mcc_dt_ids[] = {
projects / openwrt / openwrt.git / blobdiff